This is one of the most amazing projects I've seen in a long time. It's just a few chips, and a very small AtMega CPU, maybe 1000 lines of code, and you get an

This is one of the most amazing projects I've seen in a long time. It's just a few chips, and a very small AtMega CPU, maybe 1000 lines of code, and you get an AM, FM, SSB, Digital 3-50 Mhz transceiver. Lots of fun math involved (Hilbert transforms, Complex analysis) but it's nice to see it all work. We're really in a golden age of radio today.